Air washer for furances



Nov. 1, 1932.A G. F. GEHRI AIR WASHER FOR FUHNAoEs-f- Filed Jan. 29, 1930 gfx/vento@ Figy .2.

y i Geo/ge E' Gea/rfv' patented 1932 Y UNITED STQTIES `:Saisonen F. GEHRL'OF Tacoma, WASHIlmsr'ron.Y

Y Application mea January' 29, 1930. serii N. 424,272.

This invention relates to devices'for clean? ing and humidifying the air 'about' tov be heatedbv a domestic furnace. The ob] ectsof my invention are, first, to provide yanl air 5 Washer Which will effectively clean`and charge the air with moisture; second, which will eliminate the annoying sound of dripping water within the Washer; third, which will prevent leakageat the joint thereof with 19v the furnace boot; fourth, which may be readily inspected; and fifth, which is cheap to make and to operate. ,e y I attain these and other objects bythe devices and arrangements illustrated in the accompanying drawing, in which y Fig. 1 is a perspective View of my improved air washer, showing it in relationto the airsupply fan and to the furna.ce;'Fig.2 is a verticalsection thereof. Similar' numerals of reference refer to similarparts throughout theseveral views. e j

My improved air-washer is adapted to be interposed immediately between the airsupply fan, mounted in the fan casing 1, and the boot 2 vof the furnace 3. It comprises a main receptacle or box 4, of metal, having an open top on which a removable cover or lid 5 is f fitted, together with an inlet passage', and an outlet passage 7 which contains the'v elim'- inator v8. l Y The very fine spray,'or f og, or mist, of water which is projected into theY box 4 by the nozzles, fills the said box and collects on the lid 5 and on the side Walls of the box in the form of drops. These drops are too 'large to be readily absorbed by the airand would pass freely through the air stream if theyv were not collected and conducted down to the base of the box. Such drops would thus produce which it is one of the principal objects of this invention to eliminate.

The four vertical walls of the main box 4 are folded inward at the upper end to form a trough 9, as shown, extending entirely around the box opening. The lid 5 is provided with a vertical ange 10, extending downward into said trough 9. The width of the trough 9 is such that its inner walls extend inward from the flange l0. The lid 5 may preferably be an annoying and constant drip in the boxl ron a stand 19, having holes 20 in its bottom made of corrugated metal 'in order to gather the moisture `falling thereon' and carry 1 it to its sidesor edges andthus to the trouglr9. A series ofholesy 11 maybe made inthe biot:- tom of the trough 9 t'o permit the escapeof the water collected therein". A small rlip l'or cup 12 is fastened to the" ii'1'sideofl Athe/walls of the box '4,V under eachofthe outlet; holes l1, andfis adapted to catch the drip fromsaid holes and to conduct it to the sides of the box, where it-escagpes :through a hole 13 inthe cup 12." Thusall thewater which reaches-thelid 5V is led to the inner'sidesl of ythe Walls, of the box 4 and causes no dripping'or splashing noisefg ,-7 y

The connection between the inlet KIpassage Y 6 and the main box'4 is alsoV protected from drip by a trough 14 whichsurrounds its three sides vandv'fhich leadsa-ll water, whi'chiinds its way thereto, down the sides thereof to the '"1 bottom of the box V4'. f i? l* I 'A flangeil Similarly surrounds three sides ofthe connection between *the box '4 andV the outlet 'passage-7.* This flange 15 alsoforms the back stop for the eliminatorf which is '75 positionedjust outside of the said'ange 15.

:The 'eliminator 8 is ofthe'usual-construetion and consists of a series ofy parallel. bent lplates Vbetween ywhich the's'treani of, wet air passes and whichcollect thefree: moisture therefrom as it passes from'th'e washer to the furnace f A vAn inclined apron 16 is Asecuredf to the outer end of the lower'inclined side of the outlet passage 7 and catches anyv moisture from theeliminator 8`which mightl tryfto Vescapeoto the 'joint 17- betweenthe outlet passage `i Vand kthe furnace b`oot'f2,` leading such water back intov the box 4,1 thus enabling the said ljoint'to be' made in theusual lway without y'risk of leakage of Water there v through.- A'iange 18 formsa part vof this joint 17 and holdsV the outer side'of the eliminator 8. The said eliminatorS is mounted edge Yto permitth'e lreturn of water from Athe eliminator 8 back to the box 4 by way ofth'e inclinedbottomoffthe outlet passage 7" and under-the said vstand 19. i i' `5 j ,m The fwa'terf'ffor vthe air-washer is supplied. l

by a pipe 21, which enters the box through one side thereof and which is provided with several spray nozzles adapted to throw a ne inist of water into the box. The air is driven by the fan in the fan casing l, through the inlet passage, into and through the main box 4, where it passes through the said mist or spray of water and is thoroughly cleaned of any dustand noxious gases and also absorbs a portion of the free moisture therein; the wet air then passes through the eliminator 8 where all free and surplus moisture is removed, and thus through the passage 7 and boot 2 to the air-heating chamber of the furnace 3. v

The water from the pipe 21, which is not absorbed by the air or caught by the eliminator, reaches the lid 5 or the walls of the box and is conducted down to the bottom of the box without any dripping noise. A waste pipe 22 removes the water and the dirt from the Washer.

Ther bottom surfaces of both the inlet passage 6 and the outlet passage 7 are inclined downward towards the box 4 to keep all water away from the joints at the ends of the said passages. The lid 5 is made with sloping sides to cause the water thereon to run to the trough 9.

Having described my invention, what I claim is y l. An air-washer for furnaces, comprising a main `box with means for creating a liquid spray therein and having an open top ;'v an inturned trough formed around the said open top; a lid having sloping sidesv andV a vertical peripheral flange resting in said trough; and drainage holes in lsaid trough, adapted to conduct the water from the lid to the side walls of the box.

2. An air-washer for furnaces, comprising a main box with means for creatinga liquid spray therein and having an open top.; an inturned trough formed around` the said open top; a lid of corrugated material, and having sloping sides and a vertical peripheral iiange resting in said trough; and drainage holes in said trough, adapted to conduct the water from the lid to the side walls of the box.

. 3. An air-washer for furnaces, comprising a main box 4with means for creating a liquid spray therein and having an open top; an intiirned trough formed around the said open top; a lid having sloping sides and a vertical peripheral flange resting in said trough; drainage holes in said trough; and cups, having an opening adjacent the wall, and secured to the wall of said box below each such drainage hole, whereby the water from the lid is conducted to the walls of the box.

sloping sides and a vertical peripheral flange resting in said trough; drainage holes in said trough; and cups, having an opening adjacent the wall, and secured to the wall of said box below each such drainage hole, whereby the water from the lid is conducted to the walls of the box.

5. In an` air-washerfor furnaces having a main mist-holding box with vertical walls and with means for creating a water mist therein, and a horizontal dry-air inlet passage opening into said mist-holding box through one said vertical walls with a trough -within said mist-holding box and partially surrounding the saidopening in its vertical wall and adapted to prevent the dripping of water across the stream of ldry air passing through said opening and to collect the drops from thel wall and to conductthem from the vertical wall to aV point belowsaid opening.

6. lnan air-washer foi furnaces having a main spray box having an outlet opening therein; a furnace boot;.an air ypassage having abottoin 'inclined downward towards the ,box and positioned between the box and the boot; a stand on said inclined bottom, adaptboot; a stand on said inclined bottom, adapted to permit water to pass thereunder down said incline but to prevent air from passing out thereunder from said box; an eliminator mounted on said stand and adapted to permit ieu the air to pass therethrough from said box to said boot and to collect the free water from said air; and an inclined-apron positioned in said passagebeyond said eliminator and extending above the level of said stand and adapted to receive the drops of water blown from the base of said eliminator and to return them by the inclined bottom of the passage to the box and thereby prevent their entrance into said boot.

GnoRGiiJ F. Gerini.

f 4.v An air-washer for furnaces, comprising l a main box with means for creating a liquid spray therein and having an opentop; an inturned trough formed around the said open top; alid ofcorrugated material, and having iin 

